Global Metrics

Spaces Data

Minimal test - lines (23, 52)

Code

static bool GetNextOffset(const unsigned char** pos, const unsigned char* end,
                          const unsigned char** offset) {
  if (*pos == end) return false;

  // When reading an offset the byte array must always contain at least
  // three more bytes to consume. First the offset to read, then a node
  // to skip over and finally a destination node. No object can be smaller
  // than one byte.
  MOZ_ASSERT(*pos + 2 < end);
  size_t bytes_consumed;
  switch (**pos & 0x60) {
    case 0x60:  // Read three byte offset
      *offset += (((*pos)[0] & 0x1F) << 16) | ((*pos)[1] << 8) | (*pos)[2];
      bytes_consumed = 3;
      break;
    case 0x40:  // Read two byte offset
      *offset += (((*pos)[0] & 0x1F) << 8) | (*pos)[1];
      bytes_consumed = 2;
      break;
    default:
      *offset += (*pos)[0] & 0x3F;
      bytes_consumed = 1;
  }
  if ((**pos & 0x80) != 0) {
    *pos = end;
  } else {
    *pos += bytes_consumed;
  }
  return true;
}

Minimal test - lines (55, 58)

Code

static bool IsEOL(const unsigned char* offset, const unsigned char* end) {
  MOZ_ASSERT(offset < end);
  return (*offset & 0x80) != 0;
}